<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>划分字母区间</title>
</head>
<body>
  <script>
    function fn(s) {
      let hash = {}
      for (let i = 0; i < s.length; i++) {
        hash[s[i]] = i
      }
      let result = []
      let left = 0
      let right = 0
      for (let i = 0; i < s.length; i++) {
        right = Math.max(right, hash[s[i]])
        if (right === i) {
          result.push(right - left + 1)
          left = i + 1
        }
      }
      return result
    }
    console.log(fn('ababcbacadefegdehijhklij'))
  </script>
</body>
</html>